5.15-stable review patch. If anyone has any objections, please let me know.
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From: Jarkko Nikula jarkko.nikula@linux.intel.com
[ Upstream commit 8a2be2f1db268ec735419e53ef04ca039fc027dc ]
Definitely condition dma_get_cache_alignment * defined value > 256 during driver initialization is not reason to BUG_ON(). Turn that to graceful error out with -EINVAL.
Signed-off-by: Jarkko Nikula jarkko.nikula@linux.intel.com Link: https://lore.kernel.org/r/20240628131559.502822-3-jarkko.nikula@linux.intel.... Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i3c/master/mipi-i3c-hci/dma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c index 5e3f0ee1cfd0..b9b6be186438 100644 --- a/drivers/i3c/master/mipi-i3c-hci/dma.c +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c @@ -291,7 +291,10 @@ static int hci_dma_init(struct i3c_hci *hci)
rh->ibi_chunk_sz = dma_get_cache_alignment(); rh->ibi_chunk_sz *= IBI_CHUNK_CACHELINES; - BUG_ON(rh->ibi_chunk_sz > 256); + if (rh->ibi_chunk_sz > 256) { + ret = -EINVAL; + goto err_out; + }
ibi_status_ring_sz = rh->ibi_status_sz * rh->ibi_status_entries; ibi_data_ring_sz = rh->ibi_chunk_sz * rh->ibi_chunks_total;